The election of Barack Obama sent ripples of hope throughout the United States and the international community and seeded the notion that the country had transformed itself into a postracial utopia. Meanwhile, race itself, and racism, permeated political and social arenas nationwide as the American public grappled with the question of why and how much the president's, or anyone's, racial and ethnic identity really mattered. This also led to pertinent discussions on the meaning and significance of race and ethnicity in 21st-century U.S. society. Though unified in our thirst for change, America was divided, not necessarily along racial lines but by where we stood on the position of the importance of race and ethnicity as a concept. Some saw racial and ethnic group divides as an important historic institution that formed the basis of a real social hierarchy; others saw these divides as a false notion and a shameful stain on the otherwise polished face of a great nation.

Both the embracing and the backlash surrounding Barack Obama made evident what were still very salient categories in our daily national discourse and experience: color, race, ethnicity, and nationality. Obama's political opponents weren't the only ones who called into question the president's identity; suspicion was evident on both sides of party lines as political figures and the public evaluated their new leader. Could the new president be trusted to represent mainstream America, or would he underhandedly advance black interests? Did he embody real "American" values despite being raised in a nontraditional family by a single mother? What did it mean that the president was also viewed as part of an educated black elite: Was the president black enough? What did it mean that he was rumored to worship amid an Afrocentric congregation: Was he, perhaps, too black? As a child of an interracial marriage, should he be considered black at all? And with ties to relatives in Africa, was he really even an American?

The very public examination of the president's identity, the dissection of his identity into distinct facets of his life experience, illustrates a critical connection between our individual and collective identities and the broader narrative on what it means to be a part of this nation, to be an American. It also made clear that while the shape and form of racial and ethnic identity today is ever changing, it plays as important and central a role in our lives today as it has in the past. It is not only the way many people in the United States define themselves, it is still very much the way in which we define one another.

This week on Intersection, we bring you excerpts from author Junot Díaz’s Jan. 22 talk at MU [University of Missouri].

Díaz won the 2008 Pulitzer prize for his first novel, “The Brief Wondrous Life of Oscar Wao.” He received a MacArthur ‘Genius’ Fellowship and co-founded the Voices of Our National Arts Foundation, which holds workshops for writers of color. He is a professor of writing at MIT.

Díaz immigrated from the Dominican Republic to the United State when he was six. In his literary work and activism, he tackles issues including immigration, assimilation and oppression.

His speech was part of the MU Celebrates Martin Luther King Jr. event. During the talk, Díaz spoke about white supremacy, the role of artists and the lasting effects of slavery…